What vehicles does the PRL 4-Piston Big Brake Caliper Kit fit?

The kit fits the 2017-2021 Honda Civic Si (FC1), 2022+ Honda Civic Si (FE1), 2023+ Acura Integra (DE4) and 2018+ Honda Accord with no modification. Many other Honda models fit when using the 312mm Si rotor with a 20mm spacer.

What is included in the 4-Piston Big Brake Caliper Kit?

The kit includes two PRL 4-piston forged aluminum calipers, two stainless steel braided brake lines, two application-specific CNC-machined steel brackets, and a hardware kit with crush washers, banjo bolts, security pins, pad spring bridges, bolts and bleeder caps.

Are rotors and brake pads included?

No. The 4-Piston Big Brake Caliper Kit does not include rotors or brake pads. It is designed around the OEM 312 x 25mm rotor.

What rotor and pads does the PRL kit use?

The 4-Piston Big Brake Caliper Kit works with the OEM 312mm x 25mm rotor found on the 10th and 11th generation Civic Si and the 2023+ Integra. The caliper accepts FMSI D1001 pads, the same shape as the FK8 Civic Type R, F50 and STI.

Will the 4-Piston Big Brake Caliper Kit clear my wheels?

It may depend on the wheel. The PRL caliper is about 25mm wider outward and about 30mm taller on both top and bottom than the factory caliper. PRL provides a printable 1:1 wheel clearance template to check fit with a tape measure.

Does the kit require modifications to install?

No. The 4-Piston Big Brake Caliper Kit is a bolt-on design that works with the OEM 312mm rotor and the stock hub and knuckle.

Description

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BP PRICING DIFFERENCE

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Description

PRL Motorsports 4-Piston Big Brake Caliper Kit for FC1/FE1 Honda Civic Si and DE4 Acura Integra

The PRL 4-Piston Big Brake Caliper Kit replaces the factory single-piston floating caliper on the Civic Si and Integra with a forged 6061-T6 aluminum, 2-piece fixed caliper engineered in-house. It is built around the widely available OEM 312 x 25mm rotor and accepts the same pad shape as the FK8 Civic Type R, so replacement parts are easier and cheaper to source. PRL states the fixed caliper improves pad contact, pedal feel, thermal stability and stopping confidence without hurting street drivability.

Features

4-Piston Big Brake Caliper Kit with forged 6061-T6 aluminum, 2-piece calipers
Bolt-on design that works with the OEM 312mm rotor and the stock hub and knuckle
44mm primary and 41mm secondary pistons in vented Type 3 hard-anodized 6061-T6 billet aluminum
CNC-machined 4140 billet steel brackets with an electrocoat finish
Pad shape compatible with FMSI D1001, the F50, Type R and STI pad format
Stainless steel braided brake lines included for better pedal feel under harder braking
Hard-anodized caliper body for thermal resistance, corrosion protection and appearance
Designed for daily driving, spirited weekend driving and track sessions

Specifications

Caliper construction: Forged 6061-T6 aluminum, 2-piece body
Pistons: 44mm primary and 41mm secondary
Piston material: 6061-T6 billet aluminum, vented Type 3 hard-anodized
Bracket: CNC-machined 4140 billet steel with electrocoat finish
Pad compatibility: FMSI D1001
Rotor fitment: OEM 312mm x 25mm
Weight: About 8.8 lbs per side, including bracket and hardware
Brake lines: Stainless steel braided set, included and required

What’s Included

PRL 4-piston forged aluminum calipers (2)
Stainless steel braided brake lines (2)
Application-specific CNC-machined steel brackets (2)
Hardware kit (crush washers, banjo bolts, security pins, pad spring bridges, bolts and bleeder caps)

Applications

Honda Civic Si: FC1 | 2017-2021
Honda Civic Si: FE1 | 2022+
Acura Integra: DE4 | 2023+
Honda Accord: 2018+

Notes

The 4-Piston Big Brake Caliper Kit does not include rotors or brake pads
The caliper is about 25mm wider outward and about 30mm taller on both top and bottom than the factory caliper
Other Honda models fit with the 312mm Si rotor and a 20mm spacer to fit OE Honda and Acura wheels
A 355mm rotor variant requires an alternate bracket

Frequently Asked Questions

What vehicles does the PRL 4-Piston Big Brake Caliper Kit fit? The kit fits the 2017-2021 Honda Civic Si (FC1), 2022+ Honda Civic Si (FE1), 2023+ Acura Integra (DE4) and 2018+ Honda Accord with no modification. Many other Honda models fit when using the 312mm Si rotor with a 20mm spacer.
What is included in the 4-Piston Big Brake Caliper Kit? The kit includes two PRL 4-piston forged aluminum calipers, two stainless steel braided brake lines, two application-specific CNC-machined steel brackets, and a hardware kit with crush washers, banjo bolts, security pins, pad spring bridges, bolts and bleeder caps.
Are rotors and brake pads included? No. The 4-Piston Big Brake Caliper Kit does not include rotors or brake pads. It is designed around the OEM 312 x 25mm rotor.
What rotor and pads does the PRL kit use? The 4-Piston Big Brake Caliper Kit works with the OEM 312mm x 25mm rotor found on the 10th and 11th generation Civic Si and the 2023+ Integra. The caliper accepts FMSI D1001 pads, the same shape as the FK8 Civic Type R, F50 and STI.
Will the 4-Piston Big Brake Caliper Kit clear my wheels? It may depend on the wheel. The PRL caliper is about 25mm wider outward and about 30mm taller on both top and bottom than the factory caliper. PRL provides a printable 1:1 wheel clearance template to check fit with a tape measure.
Does the kit require modifications to install? No. The 4-Piston Big Brake Caliper Kit is a bolt-on design that works with the OEM 312mm rotor and the stock hub and knuckle.

About PRL Motorsports

PRL Motorsports started in 2007 as PRL Racing, a small group of enthusiasts outside Pittsburgh, Pennsylvania, united by a single goal: faster lap times. What began trackside quickly earned a reputation for engineering excellence, producing race cars capable of 9-second quarter-mile passes as early as 2007 and 6-second times by 2009. By 2011, the operation had grown into PRL Motorsports, expanding from trackside tuning into full-scale product development and fabrication across Honda, Nissan, Mitsubishi, and Subaru platforms. In 2018, PRL Motorsports made a deliberate shift to focus entirely on manufacturing, concentrating their resources on engineering and producing performance components rather than installation and tuning services. Today, PRL Motorsports operates from a 25,000 sq/ft facility in Export, Pennsylvania, staffed by over 25 professionals and equipped with CNC machining departments, automated cutting stations, dual-spindle lathes, 5-axis milling centers, and robotic loading systems running 24-hour production capacity. Their catalog covers intercooler systems, intake systems, turbocharger systems, exhaust components, and throttle body and intake manifold adapters, many of which carry CARB compliance and SEMA Garage certification. From a 9-second S13 to tuning the first 10th-generation Civic into the 10-second range in 2019, PRL Motorsports has built its reputation on one principle: never settle, always push for the best possible outcome.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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PRL Motorsports 4-Piston Big Brake Caliper Kit for FC1/FE1 Honda Civic Si and DE4 Acura Integra

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PRL Motorsports 4-Piston Big Brake Caliper Kit for FC1/FE1 Honda Civic Si and DE4 Acura Integra

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About PRL Motorsports

Reviews